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Myrna Holtz Wooders 《Journal of Mathematical Economics》1983,11(3):277-300
Sufficient conditions are given for large replica games without side payments to have non-empty approximate cores for all sufficiently large replications. No ‘balancedness’ assumptions are required. The conditions are superadditivity, a boundedness condition, and convexity of the payoff sets. 相似文献
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Summary. A law of scarcity is that scarceness is rewarded. We demonstrate laws of scarcity for cores and approximate cores of games. Furthermore, we show that equal treatment core payoff vectors satisfy a condition of cyclic monotonicity. Our results are developed for parameterized collections of games and exact bounds on the maximum possible deviation of approximate core payoff vectors from satisfying a law of scarcity are stated in terms of the parameters describing the games. We note that the parameters can, in principle, be estimated.Received: 21 November 2002, Revised: 7 October 2003, JEL Classification Numbers:
C71, C78, D41.
Correspondence to: Myrna WoodersThis research was initiated in 1994 when the first author was in the IDEA Ph.D. Program of the Autonomous University of Barcelona. Support by the IBM Fund Award, the Latané Fund, the University of North Carolina Research Council, and the Warwick Centre for Public Economics is acknowledged. The second author gratefully acknowledges the support of the Direccio General dUniversitats of Catalonia, the Social Sciences and Humanities Research Council of Canada, and the Department of Economics of the Autonomous University of Barcelona. This article is dedicated to Marcel (Ket) Richter, a distinguished researcher and a wonderful teacher and mentor to his students. We are delighted to contribute our paper to this special issue of Economic Theory in his honor. 相似文献
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Myrna Holtz Wooders 《Economic Theory》1992,2(1):129-147
Summary Inessentiality of large groups or, in other words, effectiveness of small groups, means that almost all gains to group formation can be realized by partitions of the players into groups bounded in absolute size. The approximate core property is that all sufficiently large games have nonempty approximate cores. I consider these properties in a framework of games in characteristic function form satisfying a mild boundedness condition where, when the games have many players, most players have many substitutes. I show that large (finite) games satisfy inessentially of large groupsif and only if they satisfy the approximate core property.This paper focuses on a part of another paper, Inessentiality of Large Coalitions and the Approximate Core Property; Two Equivalence Theorems, previously circulated as a University of Bonn Sonderforschungsbereich Discussion Paper.The author is indebted to Roger Myerson for a very stimulating comment and the term inessentiality of large coalitions. She is also indebted to Robert Anderson, Sergiu Hart, and Aldo Rustichini for helpful conversations. She is especially indebted to Robert Aumann for many stimulating and helpful discussions on research leading to this paper. The author gratefully acknowledges the financial support of the SSHRC and the hospitality and support of the University of Bonn through Sonderforschungsbereich 303. 相似文献
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This paper analyses the effects of resin benefit on the optimal rotation age of Simao pine plantation. Timber growth and resin yield functions were first derived, and then an integrated formulation for Hartman rotation was solved by taking both timber and resin benefits into consideration through numerical optimization. Empirical results indicate that: (1) the inclusion of resin benefit results in lengthening optimal rotation age; (2) resin benefit has a greater effect on rotation age when discount rate is low than when it is high, ceteris paribus; (3) with an improvement of site productivity, resin benefit has a decreasing effect on rotation age, other factors being constant. These effects are also true with respect to benefit gains in present value. 相似文献
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We introduce the framework of parameterized collections of games with and without sidepayments and provide three nonemptiness of approximate core theorems. The parameters bound (a) the number of approximate types of players and the size of the approximation and (b) the size of nearly effective groups of players and their distance from exact effectiveness. Our theorems are based on a new notion of partition-balanced profiles and approximately partition-balanced profiles. The results are applied to a new model of an economy with clubs. In contrast to the extant literature, our approach allows both widespread externalities and uniform results. A fundamental new mathematical result, the partition-balancing effect of large numbers, which promises to have further applications, is contained in Appendix A. 相似文献
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Svante Mandell 《Transport Policy》2011,18(6):888-892
New infrastructure projects may affect CO2 emissions and, thus, cost benefit analyses for these projects require a value to apply for CO2. This may be based on the marginal social cost of emissions or on the shadow price resulting from present and future policies. This paper argues that both approaches are necessary, but for cost benefit analysis of infrastructure projects the latter should be the primary tool. A series of complications arise when applying this principle in practice. These are discussed in the paper. Even if the complications make the implementation of a shadow price approach difficult, we argue that the approach still is preferable to a social cost approach. 相似文献